In all my years I have never seen a paint that covered in one coat. I've tried the paints, the rollers, it doesn't work. It's close but it doesn't work. Just grab another can and put a second coat on it and be done with it. What looks good now won't look good tomorrow morning as you discover new areas that need a touch up. Then another. Then were you cut in stands out. My standard is prime, then paint 2 coats. Rarely have I ever had a problem.